The Tor Browser: security/sandbox/chromium/base/synchronization/lock

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

     1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     5 #ifndef BASE_SYNCHRONIZATION_LOCK_IMPL_H_

     6 #define BASE_SYNCHRONIZATION_LOCK_IMPL_H_

     8 #include "build/build_config.h"

    10 #if defined(OS_WIN)

    11 #include <windows.h>

    12 #elif defined(OS_POSIX)

    13 #include <pthread.h>

    14 #endif

    16 #include "base/base_export.h"

    17 #include "base/basictypes.h"

    19 namespace base {

    20 namespace internal {

    22 // This class implements the underlying platform-specific spin-lock mechanism

    23 // used for the Lock class.  Most users should not use LockImpl directly, but

    24 // should instead use Lock.

    25 class BASE_EXPORT LockImpl {

    26  public:

    27 #if defined(OS_WIN)

    28   typedef CRITICAL_SECTION NativeHandle;

    29 #elif defined(OS_POSIX)

    30   typedef pthread_mutex_t NativeHandle;

    31 #endif

    33   LockImpl();

    34   ~LockImpl();

    36   // If the lock is not held, take it and return true.  If the lock is already

    37   // held by something else, immediately return false.

    38   bool Try();

    40   // Take the lock, blocking until it is available if necessary.

    41   void Lock();

    43   // Release the lock.  This must only be called by the lock's holder: after

    44   // a successful call to Try, or a call to Lock.

    45   void Unlock();

    47   // Return the native underlying lock.

    48   // TODO(awalker): refactor lock and condition variables so that this is

    49   // unnecessary.

    50   NativeHandle* native_handle() { return &native_handle_; }

    52  private:

    53   NativeHandle native_handle_;

    55   DISALLOW_COPY_AND_ASSIGN(LockImpl);

    56 };

    58 }  // namespace internal

    59 }  // namespace base

    61 #endif  // BASE_SYNCHRONIZATION_LOCK_IMPL_H_

The Tor Browser / file revision